Light source device and projection system

Abstract

A light source assembly comprises an LED light source assembly (S1), a laser light source assembly (S2) and a first light combination assembly (S3). The LED light source assembly (S1) comprises a first LED light source (11), a second LED light source (12) and a third LED light source (13); the first LED light source (11) emits light of a first wave band, the second LED light source (12) emits light of a second wave band, and the third LED light source (13) emits light of a third wave band; the laser light source assembly (S2) is used for emitting light of a fourth wave band, and the first wave band covers the fourth wave band; the first light combination assembly (S3) is located at the intersection of the emergent light of the LED light source assembly (S1) and the emergent light of the laser light source assembly (S2), and the first light combination assembly (S3) is used for reflecting the emergent light of the LED light source assembly (S1) and transmitting the emergent light of the laser light source assembly (S2). Meanwhile, the invention further provides a projection system.

Description

Light source device and projection system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on June 23, 2022, with application number 202210725162.6 and application name “A light source device and projection system”, the entire contents of which are incorporated by reference into this application; this application claims priority to the Chinese patent application filed with the China Patent Office on June 23, 2022, with application number 202210726237.2 and application name “A light source device and projection system”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present disclosure relates to the field of projection display technology, and in particular to a light source device and a projection system. Background Art

[0004] Projection display is a technology that uses optical systems and projection space to magnify and display flat images on a screen by controlling the light source using flat image information. With the development of projection display technology, it has gradually been applied to business activities, conferences and exhibitions, scientific education, military command, traffic management, centralized monitoring, advertising and entertainment, and other fields. Its advantages, such as large display size and clear display, are also suitable for large-screen display requirements.

[0005] Light emitting diodes (LEDs) have the advantages of fast response, low power consumption, and long service life. Applying LEDs to projection systems can change the complex optical path structure of the original light source; and the small size of LED light sources is conducive to the miniaturization and lightweight design of projection systems.

[0006] However, due to the loss of light energy during the projection process, the current LED light source projection system still has the problem of low brightness, and is unable to further improve the color of the picture or increase the color gamut.

[0007] Summary of the Invention

[0008] According to a first aspect of an embodiment of the present disclosure, a light source device is provided, comprising: an LED light source assembly, a laser light source assembly, and a first light combining assembly. The first light combining assembly combines the three-color light emitted by the LED light source assembly and the laser light emitted by the laser light source assembly. By adding a laser light source assembly to the light source device and combining the monochromatic light emitted by the laser light source assembly with the three-color light emitted by the LED light source assembly, the light source device can be improved without changing the structure of the LED light source assembly, thereby increasing the light output brightness of the light source device; the laser light source itself has a large color gamut, and by adjusting the ratio of the laser light source to the LED light source, the color expression ability can be effectively enhanced and the color gamut can be improved; the volume and energy consumption of the laser light source are smaller than those of the corresponding LED light source, so combining the LED light source assembly with the laser light source assembly will not excessively increase the volume and energy consumption of the light source device.

[0009] According to the second aspect of the embodiments of the present disclosure, a light source device is provided, comprising: a first LED light source, a second LED light source, a third LED light source, and at least one laser light source. The light source device is provided with two light combining components, the first light combining component is located at the intersection of the output light of the first LED light source and the output light of the laser light source, and the first light combining component is used to combine the output light of the first LED light source with the output light of the laser light source; the second light combining component is located at the intersection of the output light of the second LED light source, the output light of the third LED light source, and the output light of the first light combining component, and the second light combining component is used to combine the output light of the first light combining component with the output light of the second LED light source and the output light of the third LED light source. A laser light source is added to the three-color LED light source system to increase the light output brightness of the light source device; the laser light source itself has a large color gamut, and by adjusting the ratio of the laser light source to the LED light source, the color expression ability can be effectively enhanced and the color gamut can be improved; the volume and energy consumption of the laser light source are both smaller than those of the corresponding LED light source, so adding a laser light source to the original LED light source system will not excessively increase the volume and energy consumption of the light source device.

[0010] A third aspect of the disclosed embodiments provides a projection system comprising any of the aforementioned light source devices, an illumination optical path, a light valve modulation component, and a projection lens. The illumination optical path is located on the light-exiting side of the light source device, the light valve modulation component is located on the light-exiting side of the illumination optical path, and the projection lens is located on the reflected light path of the light valve modulation component. By controlling the color ratio of the laser light source and the LED light source, the projection system can achieve the desired image quality with enhanced color, color gamut, and brightness. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments of the present disclosure. Obviously, the drawings introduced below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0012] FIG1 is a schematic structural diagram of a light source device in the related art;

[0013] FIG2 is a schematic diagram of a structure of a light source device according to an embodiment of the present disclosure;

[0014] FIG3 is a schematic structural diagram of an LED light source assembly provided in an embodiment of the present disclosure;

[0015] FIG4 is a second structural schematic diagram of a light source device provided in an embodiment of the present disclosure;

[0016] FIG5 is a third structural diagram of a light source device provided in an embodiment of the present disclosure;

[0017] FIG6 is a fourth structural diagram of a light source device provided in an embodiment of the present disclosure;

[0018] FIG7 is a fifth structural diagram of a light source device provided in an embodiment of the present disclosure;

[0019] FIG8 is a sixth structural diagram of a light source device provided in an embodiment of the present disclosure;

[0020] FIG9 is a seventh structural diagram of a light source device provided in an embodiment of the present disclosure;

[0021] FIG10 is an eighth structural diagram of a light source device provided in an embodiment of the present disclosure;

[0022] FIG11 is a ninth structural diagram of a light source device provided in an embodiment of the present disclosure;

[0023] FIG12 is a tenth structural diagram of a light source device provided in an embodiment of the present disclosure;

[0024] FIG13 is an eleventh structural diagram of a light source device provided in an embodiment of the present disclosure;

[0025] FIG14 is a twelfth structural diagram of a light source device provided in an embodiment of the present disclosure;

[0026] FIG15 is a thirteenth structural diagram of a light source device provided in an embodiment of the present disclosure;

[0027] FIG16 is a fourteenth structural diagram of a light source device provided in an embodiment of the present disclosure;

[0028] FIG17 is a fifteenth structural diagram of a light source device provided in an embodiment of the present disclosure;

[0029] FIG18 is a sixteenth structural diagram of a light source device provided in an embodiment of the present disclosure;

[0030] FIG19 is a seventeenth structural diagram of a light source device provided in an embodiment of the present disclosure;

[0031] FIG20 is a schematic diagram of a structure of a projection system according to an embodiment of the present disclosure;

[0032] FIG. 21 is a second schematic diagram of the structure of the projection system provided in an embodiment of the present disclosure.

[0033] Among them, S1-LED light source assembly, S2-laser light source assembly, S3-first light combining assembly, 2-second light combining assembly, 11-first LED light source, 12-second LED light source, 13-third LED light source, 14-fourth LED light source, 121-blue LED chip, 122-green phosphor, L-laser light source, 21-first light combining mirror, 22-second light combining mirror, 23-reflector, 24-third light combining mirror, 25-transmitting mirror , 31-first collimating lens group, 32-second collimating lens group, 33-third collimating lens group, 34-fourth collimating lens group, 35-converging lens group, f-reflection area, h-transmission area, f'-reflective layer, 4-beam reduction lens group, 5-light uniforming component, 51-first light uniforming component, 52-second light uniforming component, 6-fifth collimating lens group, 100-light source device, 200-illumination light path, 300-light valve modulation component, 400-projection lens. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the present disclosure more obvious and easy to understand, the present disclosure will be further described below with reference to the accompanying drawings and examples. However, the example embodiments can be implemented in various forms and should not be understood as being limited to the embodiments set forth herein; on the contrary, these embodiments are provided to make the present disclosure more comprehensive and complete, and to fully convey the concepts of the example embodiments to those skilled in the art. The same figure marks in the figures represent the same or similar structures, and their repeated descriptions will be omitted. The words expressing position and direction described in the present disclosure are all explained using the accompanying drawings as examples, but changes can be made as needed, and all changes are included in the scope of protection of the present disclosure. The drawings of the present disclosure are only used to illustrate relative position relationships and do not represent true proportions.

[0035] Projection display is a technology that controls the light source by using flat image information, and uses the optical system and projection space to magnify the image and display it on the projection screen.

[0036] As a crucial component in a projection system, the projector light source determines the display brightness and color gamut. Light-emitting diodes (LEDs) offer advantages such as fast response, low power consumption, and long lifespan. Using LEDs as projection system light sources can change the complex optical path structure of existing light sources. Furthermore, LED light sources are compact, facilitating the miniaturization and lightweight design of projection systems.

[0037] In order to achieve full-color display, a light source that can emit three primary colors of light is usually required in the light source device. In a light source device using LED as a light source, a first LED light source for emitting red light, a second LED light source for emitting green light, and a third LED light source for emitting blue light can be simultaneously provided.

[0038] FIG1 is a schematic structural diagram of a light source device in related art.

[0039] As shown in FIG1 , the red light a emitted by the first LED light source 11, the green light b emitted by the second LED light source 12, and the blue light c emitted by the third LED light source 13 are combined and emitted, thereby enabling the projection light source to emit three primary colors of light.

[0040] However, due to the loss of light energy during the projection process, the current projection system using LED light sources still has the problem of low brightness, and due to the limited color gamut of LED, it is impossible to further improve the color of the picture and increase the color gamut.

[0041] Therefore, the embodiment of the present disclosure adds a laser light source on the basis of the LED light source architecture to improve the brightness of the light source device, while also helping to further improve the color gamut range and optimize the color performance capability of the projection system.

[0042] In some embodiments, a laser light source can be added without changing the structure of the three-color LED light source, thereby improving the light output brightness of the light source device and increasing the color gamut of the light source device.

[0043] In some embodiments, the LED light source and the laser light source emitting the same color light may be combined first, and then the three-color light may be combined, thereby increasing the light output brightness of the light source device and increasing the color gamut of the light source device.

[0044] The specific structures of the above two types of light source devices will be described below.

[0045] FIG2 is one of the structural schematic diagrams of the light source device provided in an embodiment of the present disclosure.

[0046] In some embodiments, as shown in FIG2 , the light source device provided by the embodiment of the present disclosure includes: an LED light source assembly S1 , a laser light source assembly S1 and a first light combining assembly S3 .

[0047] The LED light source assembly S1 comprises at least a first LED light source 11, a second LED light source 12 and a third LED light source 13. The first LED light source 11 emits light a of a first wavelength band, the second LED light source 12 emits light b of a second wavelength band, and the third LED light source 13 emits light c of a third wavelength band.

[0048] In the embodiment of the present disclosure, the light a in the first wavelength band may be red light, the light b in the second wavelength band may be green light, and the light c in the third wavelength band may be blue light, which is not limited here.

[0049] The laser light source assembly S2 includes at least one laser light source L, which emits laser light d in the fourth wavelength band. Laser light has a narrow half-width at half-maximum and high energy at its peak wavelength. Compared to laser light sources, LED light sources emit less light energy and cover a wider wavelength band. In the disclosed embodiment, the first LED light source 11 and the laser light source L emit light of the same color, and the light in the first wavelength band emitted by the first LED light source 11 overlaps the laser light in the fourth wavelength band emitted by the laser light source L. The laser light d in the fourth wavelength band emitted by the laser light source L can be red light.

[0050] The first light combining assembly S3 is located at the intersection of the light emitted by the LED light source assembly S1 and the light emitted by the laser light source assembly S2. The first light combining assembly S3 is used to reflect the light emitted by the LED light source assembly S1 and transmit the light emitted by the laser light source assembly S2.

[0051] The light source device provided in the embodiment of the present disclosure includes two light source components, namely an LED light source component and a laser light source component. The brightness of the laser light source component is greater than that of the LED light source component. By adding a laser light source component to the light source device and combining the monochromatic light emitted by the laser light source component with the three-color light emitted by the LED light source component, the light source device can be improved without changing the structure of the LED light source component, thereby increasing the light output brightness of the light source device. The laser light source itself has a large color gamut. Adding a laser light source component to the light source device can effectively enhance the color expression ability and improve the color gamut by adjusting the ratio of the laser light source to the LED light source. The volume and energy consumption of currently common laser light sources are smaller than those of the corresponding LED light sources. Therefore, combining the LED light source component with the laser light source component will not excessively increase the volume and energy consumption of the light source device.

[0052] Specifically, as shown in FIG2 , a second light combining assembly 2 is provided in the LED light source assembly. The second light combining assembly 2 is located at the intersection of the light emitted by each LED light source and can combine the light of different colors emitted by each LED light source into white light and emit it to the first light combining assembly S3 .

[0053] In a specific implementation, the first LED light source 11 is a red LED, the second LED light source 12 is a green LED, and the third LED light source 13 is a blue LED. The laser light source L is a red laser chip or a red laser, which is not limited here.

[0054] FIG3 is a schematic structural diagram of an LED light source assembly provided in an embodiment of the present disclosure.

[0055] The second LED light source 12 is a green LED. The green LED contains a blue LED chip 121 and green phosphor 122. The blue LED chip 121 excites the green phosphor 122, emitting green light. However, the brightness of green LEDs is relatively low. To increase the brightness of green light, a blue light source can be added to excite the green phosphor 122. This increases the number of times the green phosphor 122 in the green LED is stimulated to emit light, thereby enhancing the intensity of the green light.

[0056] In some embodiments, as shown in FIG3 , the LED light source assembly further includes a fourth LED light source 14 . The fourth LED light source 14 emits light c of the third wavelength band, and is used to illuminate and excite the second LED light source 12 to emit light b of the second wavelength band.

[0057] As shown in FIG3 , the fourth LED light source 14 can emit light c of the third wavelength band to the second LED light source 12 through the second light combining assembly 2 , thereby stimulating the green phosphor 122 in the second LED light source 12 to increase the emission of light b of the second wavelength band.

[0058] In the disclosed embodiment, the light b in the second wavelength band may be green light, and the light c in the third wavelength band may be blue light. The second LED light source 12 may be a green LED, and the fourth LED light source 14 may be a blue LED. The blue light emitted by the blue LED illuminates the green phosphor 122 in the second LED light source 12, which can re-excite green light. This increases the number of excitations of the green phosphor 122, thereby increasing the brightness of the green light from the light source device.

[0059] FIG4 is a second structural schematic diagram of the light source device provided in an embodiment of the present disclosure.

[0060] As shown in Figure 4, the second light combining component includes: a first light combining mirror 21 and a second light combining mirror 22; the first LED light source 11 and the second LED light source 12 are arranged in parallel, the first LED light source 11 and the third LED light source 13 are arranged vertically, and the second LED light source 12 and the fourth LED light source 14 are arranged vertically.

[0061] The first light combining mirror 21 is located at the intersection of the light emitted by the first LED light source 11 and the light emitted by the third LED light source 13 . The first light combining mirror 21 is used to transmit the light c of the third wavelength band and reflect the light a of the first wavelength band.

[0062] The second light combining mirror 22 is located at the intersection of the output light of the first light combining mirror 21 and the output light of the second LED light source 12, and at the intersection of the output light of the second LED light source 12 and the output light of the fourth LED light source 14. The second light combining mirror 22 is used to transmit the light b of the second band and reflect the light a of the first band and the light c of the third band.

[0063] In the disclosed embodiment, the light a in the first wavelength band is red light, the light b in the second wavelength band is green light, and the light c in the third wavelength band is blue light. Both the first light combining mirror 21 and the second light combining mirror 22 can be dichroic mirrors. Dichroic mirrors are formed by coating a film on the surface of a transparent flat plate using the principle of thin film interference, and can enhance the transmission or reflection of light in different wavelength bands as needed.

[0064] Specifically, as shown in Figure 4, the first light-combining mirror 21 is used to transmit blue light and reflect red light. The blue light (light c in the third wavelength band) emitted by the third LED light source 13 is incident on the first light-combining mirror 21 and transmitted by the first light-combining mirror 21 toward the second light-combining mirror 22. The red light (light a in the first wavelength band) emitted by the first LED light source 11 is incident on the first light-combining mirror 21 and reflected by the first light-combining mirror 21 toward the second light-combining mirror 22. This combines the blue light (light c in the third wavelength band) and the red light (light a in the first wavelength band).

[0065] The second light-combining mirror 22 is used for transmitting green light and reflecting blue light and red light. The blue light (light c in the third band) and the red light (light a in the first band) emitted by the first light-combining mirror 21 are incident on the second light-combining mirror 22 and are reflected by the second light-combining mirror 22 toward the first light-combining component S3; the blue light (light c in the third band) emitted by the fourth LED light source 14 is incident on the second light-combining mirror 22 and is reflected by the second light-combining mirror 22 toward the second LED light source 12; the blue light (light c in the third band) emitted by the fourth LED light source 14 excites the green light (light b in the second band) emitted by the green phosphor 122 in the second LED light source 12 and the green light (light b in the second band) emitted by the second LED light source 12 are incident on the second light-combining mirror 21 and are transmitted by the second light-combining mirror 22 toward the first light-combining component S3; thereby, the red light (light a in the first band), the green light (light b in the second band) and the blue light (light c in the third band) are combined into white light and emitted to the first light-combining component S3.

[0066] It should be noted that in the disclosed embodiment, the light emission directions of each LED light source are either parallel or perpendicular. Therefore, any light combining mirror in the second light combining assembly needs to be set at a 45° angle to the incident light. When the LED light source is incident on any light combining mirror in the light combining assembly, it is incident on the center position of the light combining mirror. This allows the centers of the light spots incident on the light combining mirror to coincide, thereby achieving a more uniform energy distribution of the light combining spot.

[0067] FIG5 is a third structural schematic diagram of the light source device provided in an embodiment of the present disclosure.

[0068] At least one laser light source L is provided in the laser light source assembly S2. To increase laser intensity, two or more laser light sources L may be provided in the laser light source assembly S2, as shown in FIG5 . The laser light source L may be a laser chip or a laser. In the disclosed embodiment, the laser light source assembly S2 may include two parallel laser light sources L, each of which may be a red laser.

[0069] In a specific implementation, a converging lens group 35 can be provided on the light-emitting side of each laser light source L to converge the laser light emitted by each laser light source L, so that the emitted light of each laser light source L is merged into one laser spot.

[0070] In the embodiment of the present disclosure, the converging lens group 35 includes at least one lens. When only one lens is used, the lens may be a convex lens, which is not limited here.

[0071] The light combining principle of the LED light source assembly S1 and the laser light source assembly S2 is described in detail below.

[0072] FIG6 is a fourth structural schematic diagram of the light source device provided in an embodiment of the present disclosure.

[0073] As shown in Figure 6, the first light-combining assembly S3 includes a reflective area f and a transmissive area h. The reflective area f is used to reflect the light emitted by the LED light source assembly S1 in a set direction, while the transmissive area h is used to transmit the light emitted by the laser light source assembly S2 in a set direction. Taking Figure 6 as an example, the set direction is horizontally to the right, and the first light-combining assembly S3 is used to combine the light emitted by the LED light source assembly S1 and the light emitted by the laser light source assembly S2 in the same direction.

[0074] Specifically, the reflective area f in the first light-combining assembly S3 may be a reflector, and the transmissive area h may be a through hole. Then, a hole may be opened on the reflector during manufacturing to form a reflector structure with a through hole.

[0075] The reflector (reflection area f) is used to reflect light a in the first wavelength band, light b in the second wavelength band, and light c in the third wavelength band, and the through hole (transmission area h) is used to transmit laser d.

[0076] In the disclosed embodiment, the first light-combining component S3 uses a reflector with a through hole (transmission area h) instead of a dichroic mirror. This is because the first light-combining component S3 needs to simultaneously reflect the light a of the first wavelength band, the light b of the second wavelength band, and the light c of the third wavelength band, and at the same time needs to transmit the laser d of the fourth wavelength band. A dichroic mirror cannot simultaneously reflect and transmit light of the same wavelength band. Therefore, a reflector with a through hole is used. On the one hand, it has a high reflectivity for the three-color light emitted by the LED light source component S1. On the other hand, the laser has a high collimation and a small spot size. The through hole is provided on the reflector to transmit the laser, thereby achieving the purpose of combining the three-color light of the LED and the laser.

[0077] In the embodiment of the present disclosure, as shown in FIG6 , the through hole (transmission area h) can be located at the center of the reflector (reflection area f), and the line connecting the center point of the reflector (reflection area f) and the center point of the second light-combining mirror 22 is parallel to the light emission direction of the second LED light source 12. The laser spot emitted by the laser light source assembly S2 to the first light-combining assembly S3 is symmetrical about the center point of the reflector (reflection area f), and the light spot emitted by the LED light source assembly S1 to the first light-combining assembly S3 is symmetrical with respect to the center point of the reflector (reflection area f). As a result, the laser spot is located in the center of the light-combining spot, so that the energy distribution of the light-combining spot is more uniform.

[0078] Since the through hole (transmission area h) transmits a portion of the emitted light of the LED light source assembly S1, causing light loss, in the embodiment of the present disclosure, the size of the through hole (transmission area h) is set as small as possible to allow the laser spot to be transmitted. For example, the area of ​​the through hole (transmission area h) can be set to be less than or equal to 1 / 10 of the area of ​​the emitted light spot of the LED light source assembly S1, so that the energy loss of the emitted light of the LED light source assembly S1 transmitted by the through hole (transmission area h) is controlled to less than 10%. Since the laser has greater energy than the emitted light of the LED, the light loss can be compensated.

[0079] FIG. 7 is a fifth structural diagram of the light source device provided in an embodiment of the present disclosure.

[0080] As shown in FIG7 , the LED light source assembly S1 further includes: a first collimating lens group 31, a second collimating lens group 32, a third collimating lens group 33, and a fourth collimating lens group 34. The first collimating lens group 31 is located on the light-emitting side of the first LED light source 11; the second collimating lens group 32 is located on the light-emitting side of the second LED light source 12; the third collimating lens group 33 is located on the light-emitting side of the third LED light source 13; and the fourth collimating lens group 34 is located on the light-emitting side of the fourth LED light source 14.

[0081] Since the emitted light of the LED light source satisfies the Lambertian distribution and has a large divergence angle, a collimating lens group is provided on the light-emitting side of each LED light source to collimate the emitted light of the LED light source before emitting it.

[0082] Each of the above-mentioned collimating lens groups includes at least one lens. Taking FIG. 7 as an example, the collimating lens group may include two lenses, which is not limited here. The structures of the first collimating lens group 31, the second collimating lens group 32, the third collimating lens group 33, and the fourth collimating lens group 34 may be the same or different, which is not limited here.

[0083] FIG8 is a sixth structural schematic diagram of the light source device provided in an embodiment of the present disclosure.

[0084] As shown in FIG8 , the LED light source assembly S1 further includes a beam-reducing lens group 4 . The beam-reducing lens group 4 is located between the first light-combining mirror 21 and the second light-combining mirror 22 .

[0085] Since the optical paths of the emitted light of each LED light source before being combined are not the same, and the emitted light of the LED light source has a certain divergence angle, and the optical paths of the first LED light source 11 and the third LED light source 13 before entering the second light combining mirror 22 are longer than those of the second LED light source 12, the longer the optical path, the larger the spot size after divergence. Therefore, the combined light of the first LED light source 11 and the third LED light source 13 needs to be reduced by the reduction lens group 4 before entering the second light combining mirror 22, so that the combined light spot of the first LED light source 11 and the third LED light source 13 is as similar as possible to the spot size of the second LED light source 12.

[0086] In the embodiment of the present disclosure, the beam reduction lens group 4 includes at least one lens. When only one lens is used, the lens may be a convex lens, which is not limited here.

[0087] FIG9 is a seventh structural schematic diagram of the light source device provided in an embodiment of the present disclosure.

[0088] As shown in FIG9 , the LED light source assembly S1 further includes a first light homogenizing component 51 located on the light-emitting side of the second light-combining mirror 22 . Correspondingly, the laser light source assembly S2 further includes a second light homogenizing component 52 located on the light-emitting side of the converging lens assembly 35 .

[0089] A first light homogenizing component 51 is provided on the light-emitting side of the second light-combining mirror 22, and a second light homogenizing component 52 is provided on the light-emitting side of the converging lens group 35. Light homogenizing components can be provided respectively for the optical paths of the LED light source assembly S1 and the laser light source assembly S2. There is no need to modify the structure of the LED light source assembly S1, and the output light of the two light source assemblies is a uniform light beam.

[0090] In a specific implementation, as shown in FIG9 , the first light homogenizing component 51 can be a fly-eye lens assembly comprising a first fly-eye lens and a second fly-eye lens disposed opposite each other. The surfaces of both the first and second fly-eye lenses include arrayed microlens units. The light beams combined by the second light combiner 22 are typically parallel. After passing through the first fly-eye lens, they are focused onto the centers of the microlens units of the second fly-eye lens. The second fly-eye lens then overlaps the imaging light from the first fly-eye lens and forms an image on the illumination surface. This effectively improves the uniformity and brightness of the illumination beam.

[0091] As shown in FIG9 , the second light homogenizing component 52 may be a light pipe, a light rod or other components, which are not limited here.

[0092] In addition, the first light homogenizing component 51 and the second light homogenizing component 52 may also be other optical elements with light homogenizing function, so as to homogenize the output light of each light source assembly, so as to make the energy of the output light spot more uniform.

[0093] FIG10 is an eighth structural schematic diagram of the light source device provided in an embodiment of the present disclosure.

[0094] As shown in FIG. 10 , the laser light source assembly S2 further includes a fifth collimating lens group 6 , which is located on the light-emitting side of the second light homogenizing component 52 .

[0095] The laser emitted by the laser light source assembly needs to be combined with the output light of the LED light source assembly through the through hole. In order to make the final output light spot of the laser light source assembly small enough, a fifth collimating lens group 6 is arranged on the light output side of the second light homogenizing component 52 to further collimate the homogenized laser beam, so that the laser beam finally emitted by the laser light source assembly can pass through the through hole (transmission area h) as much as possible to be utilized.

[0096] The fifth collimating lens group 6 includes at least one lens. Taking FIG. 10 as an example, the fifth collimating lens group 6 may include two lenses, which is not limited here.

[0097] FIG11 is a ninth structural diagram of the light source device provided in an embodiment of the present disclosure.

[0098] In some embodiments, as shown in Figure 11, the light source device provided by the embodiments of the present disclosure includes: a first LED light source 11, a second LED light source 12, and a third LED light source 13. The first LED light source 11 emits light a in a first wavelength band, the second LED light source 12 emits light b in a second wavelength band, and the third LED light source 13 emits light c in a third wavelength band. In the embodiments of the present disclosure, the light a in the first wavelength band can be red light, the light b in the second wavelength band can be green light, and the light c in the third wavelength band can be blue light, without limitation.

[0099] The light source device also includes at least one laser light source L, which emits laser light d in the fourth wavelength band. Laser light has a narrow half-width at half-maximum and high energy at its peak wavelength. Compared to laser light sources, LED light sources emit light with lower energy and cover a wider wavelength band. In the disclosed embodiment, the first LED light source 11 and the laser light source L emit light of the same color, and the light in the first wavelength band emitted by the first LED light source 11 overlaps the laser light in the fourth wavelength band emitted by the laser light source L. The laser light d in the fourth wavelength band emitted by the laser light source L can be red light.

[0100] As shown in FIG11 , the light source device further includes: a first light combining assembly S3 and a second light combining assembly 2 .

[0101] The first light combining component S3 is located at the intersection of the light emitted by the first LED light source 11 and the light emitted by the laser light source. The first light combining component S3 is used to combine the first band light a emitted by the first LED light source 11 and the fourth band laser d emitted by the laser light source L.

[0102] The second light combining component 2 is located at the intersection of the output light of the first light combining component S3, the output light of the second LED light source 12 and the output light of the third LED light source 13. The second light combining component 2 is used to combine the first band light a and the fourth band laser d emitted by the first light combining component S3 with the second band light b emitted by the second LED light source 12 and the third band light c emitted by the third LED light source 13.

[0103] The brightness of a laser light source is greater than that of an LED light source. By adding a laser light source to a three-color LED light source architecture, the output light of the laser light source can be combined with the output light of an LED light source of the same color and then combined with LED light sources of other colors, thereby increasing the output brightness of the light source device. The laser light source itself has a large color gamut. By adding a laser light source to the light source device, the color expression capability can be effectively enhanced and the color gamut can be improved by adjusting the ratio of the laser light source to the LED light source. Currently, the volume and energy consumption of common laser light sources are smaller than those of the corresponding LED light sources. Therefore, adding a laser light source to the original LED light source system will not excessively increase the volume and energy consumption of the light source device.

[0104] In a specific implementation, the first LED light source 11 is a red LED, the second LED light source 12 is a green LED, and the third LED light source 13 is a blue LED. The laser light source L is a red laser chip or a red laser, which is not limited here.

[0105] FIG12 is a tenth structural schematic diagram of the light source device provided in an embodiment of the present disclosure.

[0106] The second LED light source 12 is a green LED. The green LED contains a blue LED chip 121 and green phosphor 122. The blue LED chip 121 excites the green phosphor 122, emitting green light. However, the brightness of green LEDs is relatively low. To increase the brightness of green light, a blue light source can be added to excite the green phosphor 122. This increases the number of times the green phosphor 122 in the green LED is stimulated to emit light, thereby enhancing the intensity of the green light.

[0107] As shown in FIG12 , the light source device further includes a fourth LED light source 14. The fourth LED light source 14 emits light c of the third wavelength band, and is used to illuminate and excite the second LED light source 12 to emit light b of the second wavelength band.

[0108] As shown in FIG12 , the fourth LED light source 14 can emit light of the third wavelength band to the second LED light source 12 through the second light combining assembly 2 , thereby stimulating the green phosphor 122 in the second LED light source 12 to increase the emission of light of the second wavelength band.

[0109] In the disclosed embodiment, the light b in the second wavelength band may be green light, and the light c in the third wavelength band may be blue light. The second LED light source 12 may be a green LED, and the fourth LED light source 14 may be a blue LED. The blue light emitted by the blue LED illuminates the green phosphor 122 in the second LED light source 12, which can re-excite green light. This increases the number of excitations of the green phosphor 122, thereby increasing the brightness of the green light from the light source device.

[0110] As shown in FIG12 , the second light combining assembly 2 includes a first light combining mirror 21 and a second light combining mirror 22 .

[0111] The first LED light source 11 and the second LED light source 12 are arranged in parallel, the second LED light source 12 and the third LED light source 13 are arranged vertically, and the second LED light source 12 and the fourth LED light source 14 are arranged oppositely; the first LED light source 11 and the laser light source L are arranged vertically.

[0112] The first light-combining mirror 21 is located at the intersection of the light emitted by the second LED light source 12, the light emitted by the third LED light source 13, and the light emitted by the fourth LED light source 14. The first light-combining mirror 21 is used to transmit the light c of the third wavelength band and reflect the light b of the second wavelength band. The second light-combining mirror 22 is located at the intersection of the light emitted by the first light-combining mirror 21 and the light emitted by the first light-combining assembly S3. The second light-combining mirror 22 is used to transmit the light a of the first wavelength band and reflect the light b of the second wavelength band and the light c of the third wavelength band. Since the first wavelength band covers the fourth wavelength band, the second light-combining mirror 21 can also transmit the laser light d of the fourth wavelength band.

[0113] In the disclosed embodiment, the light a in the first wavelength band is red light, the light b in the second wavelength band is green light, the light c in the third wavelength band is blue light, and the laser light d in the fourth wavelength band is red light. Both the first light combining mirror 21 and the second light combining mirror 22 can be dichroic mirrors. Dichroic mirrors are formed by coating a film on the surface of a transparent flat plate using the principle of thin film interference, and can enhance the transmission or reflection of light in different wavelength bands as needed.

[0114] Specifically, as shown in Figure 12, the first light-combining mirror 21 is used to transmit blue light and reflect green light. The blue light (light c in the third wavelength band) emitted by the third LED light source 13 is incident on the first light-combining mirror 21 and is transmitted by the first light-combining mirror 21 toward the second light-combining mirror 22. The blue light (light c in the third wavelength band) emitted by the fourth LED light source 14 is incident on the first light-combining mirror 21 and is transmitted by the first light-combining mirror 21 toward the second LED light source 12. The blue light (light c in the third wavelength band) emitted by the fourth LED light source 14 excites the green phosphor 122 in the second LED light source 12 to emit green light (light b in the second wavelength band). The green light (light b in the second wavelength band) emitted by the second LED light source 12 also enters the first light-combining mirror 21 and is reflected by the first light-combining mirror 21 toward the second light-combining mirror 22. Thus, the blue light (light c in the third wavelength band) and the green light (light b in the second wavelength band) are combined.

[0115] The second light-combining mirror 22 is used to transmit red light and reflect blue and green light. The blue light (light c in the third wavelength band) and green light (light b in the second wavelength band) emitted by the first light-combining mirror 21 enter the second light-combining mirror 22 and are reflected by the second light-combining mirror 22 in a set direction. The red light (light a in the first wavelength band) emitted by the first LED light source 11 and the red laser light (laser d in the fourth wavelength band) emitted by the laser light source L are combined and then enter the second light-combining mirror 22 and are transmitted by the second light-combining mirror in a set direction. Thus, the red light (light a in the first wavelength band), the red laser light (laser d in the fourth wavelength band), the green light (light b in the second wavelength band), and the blue light (light c in the third wavelength band) are combined into white light and emitted in a set direction.

[0116] It should be noted that in the disclosed embodiment, the light emission directions of the LED light source and the laser light source are either parallel or perpendicular. Therefore, any light combining mirror in the second light combining assembly needs to be set at a 45° angle to the incident light. When the LED light source is incident on any light combining mirror in the second light combining assembly, it is incident on the center position of the light combining mirror. This allows the centers of the light spots incident on the light combining mirror to coincide, thereby achieving a more uniform energy distribution of the light combining spot.

[0117] FIG13 is an eleventh structural diagram of the light source device provided in an embodiment of the present disclosure.

[0118] At least one laser light source L is provided in the light source device. To increase laser intensity, two or more laser light sources L may be provided in the light source device, as shown in FIG13 . The laser light source L may be a laser chip or a laser. In the disclosed embodiment, the light source device may include two parallel laser light sources L, each of which may be a red laser.

[0119] In a specific implementation, a converging lens group 35 may be provided on the light-emitting side of each laser light source to converge the laser light emitted by each laser light source, thereby merging the emitted light of each laser light source into one laser spot.

[0120] In the embodiment of the present disclosure, the converging lens group 35 includes at least one lens. When only one lens is used, the lens may be a convex lens, which is not limited here.

[0121] The specific implementation of combining the first LED light source 11 and the laser light source L is described below.

[0122] FIG14 is a twelfth structural diagram of the light source device provided in an embodiment of the present disclosure.

[0123] In some embodiments, as shown in FIG14 , the first light combining assembly uses a reflector 23 . The reflector 23 is disposed on the second light combining mirror 22 ; the reflector 23 is used to reflect the emitted light of the laser light source L toward the second light combining mirror 22 .

[0124] The laser light emitted by the laser light source L first enters the reflector 23 and is reflected by the reflector 23 toward the second light combining mirror 22, while the light emitted by the first LED light source 11 is directly emitted toward the second light combining mirror 22, thereby combining the light emitted by the first LED light source 11 with the laser light emitted by the laser light source L.

[0125] In the embodiment of the present disclosure, the reflector 23 can be set between the second light combining mirror 22 and the first LED light source 11. If a converging lens group is set on the light output side of the laser light source, the reflector 23 is set on the light output side of the converging lens group.

[0126] It is worth noting that, as shown in FIG14 , the laser light source L is arranged perpendicular to the first LED light source 11, and the second light combining mirror 22 is arranged at a 45° angle relative to the output light of the first LED light source 11 and the laser light source L. The reflector 23 is arranged at a 45° angle relative to the output light of the laser light source L, thereby reflecting the incident laser light toward the second light combining mirror 22.

[0127] The laser spot emitted by the laser light source L to the reflector 23 is symmetrical about the center point of the reflector 23, and the line connecting the center point of the reflector 23 and the center point of the second light-combining mirror 22 is parallel to the light emission direction of the first LED light source 11. This allows the laser reflected by the reflector to be incident on the center point of the second light-combining mirror 22, and the laser spot incident on the second light-combining mirror 22 is symmetrical with respect to the center point of the second light-combining mirror 22. The light emitted by the first LED light source 11 is also incident on the center point of the second light-combining mirror 22, so the light spot incident on the second light-combining mirror 22 is also symmetrical with respect to the center point of the second light-combining mirror 22, thereby positioning the laser spot at the center of the light-combining spot, thereby making the energy distribution of the light-combining spot more uniform.

[0128] Because the reflector 23 provided on the second light-combining mirror 22 will block a portion of the light emitted by the first LED light source 11, in the disclosed embodiment, the size of the reflector 23 is set as small as possible to fully receive the laser beam emitted by the laser light source L. Since laser light has greater energy than the light emitted by an LED, the blocked portion of the light emitted by the first LED light source 11 can be compensated by the laser light, without causing significant light loss.

[0129] FIG15 is a thirteenth schematic diagram of the structure of the light source device provided in an embodiment of the present disclosure.

[0130] In some embodiments, as shown in FIG15 , the first light combining assembly uses a third light combining mirror 24. The third light combining mirror 24 is located between the first LED light source 11 and the second light combining mirror 22. The third light combining mirror 24 is located at the intersection of the output light of the first LED light source 11 and the output light of the laser light source L. The third light combining mirror 24 is used to reflect the laser light d in the fourth wavelength band and transmit the light in the first wavelength band except the fourth wavelength band.

[0131] The light emitted by the first LED light source 11 has the same color as the light emitted by the laser light source L, and the first wavelength band covers the fourth wavelength band. Therefore, the third light combining mirror 24 can be a dichroic mirror for reflecting the light in the fourth wavelength band and transmitting the light in the first wavelength band except the fourth wavelength band.

[0132] After the light d of the fourth band emitted by the laser light source L is incident on the third light-combining mirror 24, it is reflected by the third light-combining mirror 24 toward the second light-combining mirror 22; after the light a of the first band emitted by the first LED light source 11 is incident on the third light-combining mirror 24, the light of the fourth band in the first band is reflected by the third light-combining mirror 24, while the light in the first band except the fourth band is transmitted by the third light-combining mirror 24, so that the laser d of the fourth band emitted by the laser light source L and the light in the first band except the fourth band emitted by the first LED light source 11 are combined into light.

[0133] It is worth noting that the line connecting the center point of the third light-combining mirror 24 and the center point of the second light-combining mirror 22 is parallel to the light emission direction of the first LED light source 11 and perpendicular to the light emission direction of the laser light source L. The laser light source L and the first LED light source 11 both emit light toward the center point of the third light-combining mirror 24, so that the laser spot incident on the third light-combining mirror 24 by the laser light source L and the light spot incident on the third light-combining mirror 24 by the first LED light source 11 are symmetrical relative to the center point of the third light-combining mirror 24, and the laser spot is located in the center of the light-combining spot, so that the energy distribution of the light-combining spot is more uniform.

[0134] Since the laser has greater energy than the emitted light of the LED, the energy of the light in the fourth wavelength band reflected by the first LED light source 11 by the third light-combining mirror 24 is very small compared with the laser, and the light loss generated is very small.

[0135] FIG16 is the fourteenth structural schematic diagram of the light source device provided in an embodiment of the present disclosure.

[0136] In some embodiments, as shown in FIG16 , the first light-combining assembly utilizes a light-transmitting mirror 25 . The light-transmitting mirror 25 is positioned between the first LED light source 11 and the second light-combining mirror 22 , and is located at the intersection of the light emitted by the first LED light source 11 and the light emitted by the laser light source L. A reflective layer f' is provided on the portion of the surface of the light-transmitting mirror 25 facing away from the first LED light source 11 . The reflective layer f' is used to reflect the light emitted by the laser light source L toward the second light-combining mirror 22 ; the portion of the light-transmitting mirror 25 excluding the reflective layer f' is used to transmit the light emitted by the first LED light source 11 .

[0137] In a specific implementation, the light-transmitting mirror 25 can be made of a light-transmitting flat plate, such as flat glass, etc., which is not limited here.

[0138] The laser light emitted by the laser light source L is incident on the reflective layer f' and is reflected by the reflective layer f' toward the second light combining mirror 22, while the light emitted by the first LED light source 11 directly passes through the area of ​​the light-transmitting mirror 25 other than the reflective layer f' and is emitted toward the second light combining mirror 22, thereby combining the light emitted by the first LED light source 11 with the laser light emitted by the laser light source L.

[0139] The reflective layer f' is located at the center of the light-transmitting mirror 25. The line connecting the center of the light-transmitting mirror 25 and the center of the second light-combining mirror 22 is parallel to the light emission direction of the first LED light source 11 and perpendicular to the light emission direction of the laser light source L. The laser spot emitted by the laser light source L onto the reflective layer f' is symmetrical about the center of the reflective layer f', and the light spot incident on the light-transmitting mirror 25 by the first LED light source 11 is symmetrical about the center of the light-transmitting mirror 25. This ensures that the laser spot is located at the center of the combined light spot, resulting in a more uniform energy distribution of the combined light spot.

[0140] Because the reflective layer f' blocks a portion of the light emitted by the first LED light source 11, the size of the reflective layer f' needs to be as small as possible. For example, the area of ​​the reflective layer f' can be less than or equal to 1 / 10 of the area of ​​the light spot emitted by the first LED light source 11. This keeps the energy loss of the light emitted by the first LED light source 11 due to blocking by the reflective layer f' below 10%. Because laser light has greater energy than LED light, the blocked portion of the light emitted by the first LED light source 11 can be compensated by the laser light, without causing significant light loss.

[0141] In specific implementation, any one of the structures of the first light combining components in Figures 14 to 16 can be used to combine the outgoing light of the first LED light source 11 with the outgoing laser of the laser light source L, and then combine it with the outgoing light of the second LED light source 12 and the third LED light source 13 to obtain white light emitted in a set direction.

[0142] FIG17 is a fifteenth structural schematic diagram of the light source device provided in an embodiment of the present disclosure.

[0143] As shown in FIG17 , the light source device further includes: a first collimating lens group 31, a second collimating lens group 32, a third collimating lens group 33, and a fourth collimating lens group 34. The first collimating lens group 31 is located on the light-emitting side of the first LED light source 11; the second collimating lens group 32 is located on the light-emitting side of the second LED light source 12; the third collimating lens group 33 is located on the light-emitting side of the third LED light source 13; and the fourth collimating lens group 34 is located on the light-emitting side of the fourth LED light source 14.

[0144] Since the emitted light of the LED light source satisfies the Lambertian distribution and has a large divergence angle, a collimating lens group is provided on the light-emitting side of each LED light source to collimate the emitted light of the LED light source before emitting it.

[0145] The collimating lens group includes at least one lens. For example, in FIG17 , the collimating lens group may include two lenses, which is not limited here. The structures of the first collimating lens group 31, the second collimating lens group 32, the third collimating lens group 33, and the fourth collimating lens group 34 may be the same or different, which is not limited here.

[0146] FIG18 is a sixteenth structural diagram of the light source device provided in an embodiment of the present disclosure.

[0147] As shown in FIG18 , the light source device further includes a beam-reducing lens group 4 . The beam-reducing lens group 4 is located between the first light-combining mirror 21 and the second light-combining mirror 22 .

[0148] Since the optical paths of the emitted light of each LED light source before being combined are not the same, and the emitted light of the LED light source has a certain divergence angle, and the optical paths of the second LED light source 12 and the third LED light source 13 before entering the second light combining mirror 22 are longer than those of the first LED light source 11, the longer the optical path, the larger the spot size after divergence. Therefore, the combined light of the second LED light source 12 and the third LED light source 13 needs to be reduced by the reduction lens group 4 before entering the second light combining mirror 22, so that the combined light spot of the second LED light source 12 and the third LED light source 13 is as similar as possible to the spot size of the first LED light source 11.

[0149] In the embodiment of the present disclosure, the beam reduction lens group 4 includes at least one lens. When only one lens is used, the lens may be a convex lens, which is not limited here.

[0150] FIG19 is the seventeenth structural schematic diagram of the light source device provided in an embodiment of the present disclosure.

[0151] As shown in FIG19 , the light source device further includes a light homogenizing component 5 . The light homogenizing component 5 is located on the light-emitting side of the second light-combining mirror 22 .

[0152] In the embodiment of the present disclosure, a light homogenizing component 5 is provided on the light output side of the second light combining mirror 22, which can further homogenize the light beams combined from different LED light sources and laser light sources. Only one light homogenizing component 5 needs to be provided in the light source device, and there is no need to provide separate light homogenizing components for different light sources, which is beneficial to simplifying the structure of the light source device and reducing the volume of the light source device.

[0153] In a specific implementation, as shown in FIG19 , the light-homogenizing component 5 can be a fly-eye lens assembly comprising a first fly-eye lens and a second fly-eye lens disposed opposite each other. The surfaces of both the first and second fly-eye lenses include arrayed microlens units. The light beams, after being combined by the second light combiner 22, are typically parallel. After passing through the first fly-eye lens, they are focused onto the centers of the microlens units of the second fly-eye lens. The second fly-eye lens then overlaps the imaging light from the first fly-eye lens and forms an image on the illuminated surface. This effectively improves the uniformity and brightness of the illumination beam.

[0154] In addition, the light uniforming component 5 may also be a light pipe, a light rod or other components, which are not limited here.

[0155] Another aspect of the present disclosure provides a projection system. FIG20 is a schematic diagram of the structure of the projection system provided by the embodiment of the present disclosure, and FIG21 is a schematic diagram of the structure of the projection system provided by the embodiment of the present disclosure.

[0156] As shown in Figures 20 and 21 , the projection system includes any of the above-mentioned light source devices 100, an illumination optical path 200, a light valve modulation component 300, and a projection lens 400. The illumination optical path 200 is located on the light-emitting side of the light source device 100, the light valve modulation component 300 is located on the light-emitting side of the illumination optical path 200, and the projection lens 400 is located on the reflected light path of the light valve modulation component 300.

[0157] In some embodiments, as shown in Figure 20, the light source device 100 includes two light source components, namely an LED light source component and a laser light source component. The brightness of the laser light source component is greater than that of the LED light source component. By adding a laser light source component to the light source device and combining the monochromatic light emitted by the laser light source component with the three-color light emitted by the LED light source component, the light source device can be improved without changing the structure of the LED light source component, thereby increasing the light output brightness of the light source device; the laser light source itself has a large color gamut, and adding a laser light source component to the light source device can effectively enhance the color performance and improve the color gamut by adjusting the ratio of the laser light source to the LED light source; the volume and energy consumption of currently common laser light sources are smaller than those of the corresponding LED light sources, so combining the LED light source component with the laser light source component will not excessively increase the volume and energy consumption of the light source device.

[0158] In some embodiments, as shown in Figure 21, a laser light source is added to the light source device. The brightness of the laser light source is greater than that of the LED light source. By adding a laser light source to the three-color LED light source system, the output light of the laser light source is combined with the output light of the LED light source of the same color and then combined with the LED light source of other colors, which can increase the output brightness of the light source device; the laser light source itself has a large color gamut, and adding a laser light source to the light source device can effectively enhance the color performance and improve the color gamut by adjusting the ratio of the laser light source to the LED light source; the volume and energy consumption of currently common laser light sources are smaller than those of the corresponding LED light sources, so adding a laser light source to the original LED light source system will not excessively increase the volume and energy consumption of the light source device.

[0159] The illumination optical path 200 is located on the light-emitting side of the light source device 100. The illumination optical path 200 collimates the light emitted from the light source device 100 and allows the light emitted from the light source device 100 to enter the light valve modulation component 300 at a suitable angle. The illumination optical path 200 may include multiple lenses or lens groups, which are not limited here.

[0160] The light valve modulation component 300 modulates and reflects incident light. In a specific implementation, the light valve modulation component 300 can be a digital micromirror device (DMD). After passing through the illumination optical path 200, the light beam conforms to the illumination size and incident angle required by the DMD. The DMD surface comprises thousands of tiny mirrors, each of which can be individually driven for deflection. Controlling the DMD controls the brightness of the light reflected into the projection lens 400.

[0161] The projection lens 400 is used to form an image of the output light of the light valve modulation component 300 , and the image formed by the projection lens 400 is used for projection.

[0162] The projection system can achieve the desired image quality with enhanced color, color gamut and brightness by controlling the color ratio of the laser light source and the LED light source.

[0163] Although the preferred embodiments of the present disclosure have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present disclosure.

[0164] Obviously, those skilled in the art may make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is intended to include these modifications and variations.

Claims

1. A light source device, comprising: LED light source assembly; The LED light source assembly comprises at least: a first LED light source, a second LED light source and a third LED light source; The first LED light source emits light of a first wavelength band, the second LED light source emits light of a second wavelength band, and the third LED light source emits light of a third wavelength band; a laser light source assembly, configured to emit laser light of a fourth wavelength band, wherein the first wavelength band covers the fourth wavelength band; The first light combining component is located at the intersection of the output light of the LED light source component and the output light of the laser light source component. The first light combining component is used to reflect the output light of the LED light source component and transmit the output light of the laser light source component.

2. The light source device according to claim 1, wherein the first light combining assembly comprises a reflective area and a transmissive area; the reflective area is configured to reflect the light emitted by the LED light source assembly, and the transmissive area is configured to transmit the light emitted by the laser light source assembly; The reflective area is a reflector, and the reflector is used to reflect the light in the first wavelength band, the second wavelength band, and the third wavelength band; the transmissive area is a through hole, and the through hole is used to transmit laser light.

3. The light source device according to claim 2, wherein the through hole is located at the center of the first light combining component; and the area of ​​the through hole is less than or equal to 1 / 10 of the area of ​​the light spot emitted by the LED light source component.

4. The light source device according to any one of claims 1 to 3, wherein the LED light source assembly further comprises: a fourth LED light source; the fourth LED light source emits light of the third wavelength band, and the fourth LED light source is used to illuminate and excite the second LED light source to emit light of the second wavelength band; The laser light source assembly includes: at least one laser light source, configured to emit laser light of the fourth wavelength band; The light of the first wavelength band is red light, the light of the second wavelength band is green light, the light of the third wavelength band is blue light, and the laser light of the fourth wavelength band is red light; The first LED light source is a red LED, the second LED light source is a green LED, the third LED light source and the fourth LED light source are both blue LEDs; the laser light source is a red laser chip or a red laser; The second LED light source includes a blue LED chip and green phosphor; the output light of the blue LED chip excites the green phosphor to emit green light; the output light of the fourth LED light source excites the green phosphor to emit green light.

5. The light source device according to claim 4, wherein the LED light source assembly further comprises: a second light combining assembly, located at the intersection of the emitted light of each LED light source in the LED light source assembly, and configured to combine the emitted light of each LED light source and emit it toward the first light combining assembly; The second light combining assembly includes: a first light combining mirror and a second light combining mirror; The first LED light source and the second LED light source are arranged in parallel, the first LED light source and the third LED light source are arranged vertically, and the second LED light source and the fourth LED light source are arranged vertically; The first light combining mirror is located at the intersection of the light emitted by the first LED light source and the light emitted by the third LED light source, and is used to transmit the light of the third wavelength band and reflect the light of the first wavelength band; The second light-combining mirror is located at the intersection of the outgoing light of the first light-combining mirror and the outgoing light of the second LED light source, and at the intersection of the outgoing light of the second LED light source and the outgoing light of the fourth LED light source. The second light-combining mirror is used to transmit the light of the second band and reflect the light of the first band and the third band.

6. The light source device according to claim 5, wherein the LED light source assembly further comprises: a first collimating lens group, located on the light-emitting side of the first LED light source; a second collimating lens group, located on the light-emitting side of the second LED light source; a third collimating lens group, located on the light-emitting side of the third LED light source; a fourth collimating lens group, located on the light-emitting side of the fourth LED light source; a beam reducing lens group, located between the first light combining mirror and the second light combining mirror; The first light uniforming component is located on the light-emitting side of the second light-combining mirror; the first light uniforming component is a fly-eye lens group.

7. The light source device according to any one of claims 4 to 6, wherein the laser light source assembly further comprises: A converging lens group, located on the light-emitting side of the laser light source; A second light uniforming component is located on the light exit side of the converging lens group; The second light uniforming component is a light pipe or a light rod; The fifth collimating lens group is located on the light-emitting side of the second light-homogenizing component.

8. A light source device, comprising: A first LED light source, configured to emit light of a first wavelength band; a second LED light source, configured to emit light of a second wavelength band; a third LED light source, configured to emit light in a third wavelength band; at least one laser light source, configured to emit laser light of a fourth wavelength band, wherein the first wavelength band covers the fourth wavelength band; a first light combining assembly, located at the intersection of the light emitted by the first LED light source and the light emitted by the laser light source, and configured to combine the light emitted by the first LED light source with the light emitted by the laser light source; The second light-combining component is located at the intersection of the output light of the second LED light source, the output light of the third LED light source and the output light of the first light-combining component. The second light-combining component is used to combine the output light of the first light-combining component with the output light of the second LED light source and the output light of the third LED light source.

9. The light source device according to claim 8, further comprising: a fourth LED light source; the fourth LED light source emits light of the third wavelength band, and the fourth LED light source is used to illuminate and excite the second LED light source to emit light of the second wavelength band; The light of the first wavelength band is red light, the light of the second wavelength band is green light, the light of the third wavelength band is blue light, and the laser light of the fourth wavelength band is red light; The first LED light source is a red LED, the second LED light source is a green LED, the third LED light source and the fourth LED light source are both blue LEDs; the laser light source is a red laser chip or a red laser; The second LED light source includes a blue LED chip and green phosphor; the output light of the blue LED chip excites the green phosphor to emit green light; the output light of the fourth LED light source excites the green phosphor to emit green light.

10. The light source device according to claim 9, wherein the second light combining assembly comprises: a first light combining mirror and a second light combining mirror; The first LED light source and the second LED light source are arranged in parallel, the second LED light source and the third LED light source are arranged perpendicularly, and the second LED light source and the fourth LED light source are arranged oppositely; the first LED light source and the laser light source are arranged perpendicularly; The first light combining mirror is located at the intersection of the outgoing light of the second LED light source, the outgoing light of the third LED light source, and the outgoing light of the fourth LED light source, and is used to transmit the light of the third wavelength band and reflect the light of the second wavelength band; The second light-combining mirror is located at the intersection of the output light of the first light-combining mirror and the output light of the first light-combining component. The second light-combining mirror is used to transmit the light of the first wavelength band and reflect the light of the second wavelength band and the third wavelength band.

11. The light source device according to claim 10, wherein the first light combining component comprises: a reflector, disposed on the second light-combining mirror; the reflector is used to reflect the emitted light of the laser light source toward the second light-combining mirror; A line connecting the center point of the reflector and the center point of the second light combining mirror is parallel to the light emitting direction of the first LED light source.

12. The light source device according to claim 10, wherein the first light combining component comprises: The third light-combining mirror is located between the first LED light source and the second light-combining mirror, and at the intersection of the output light of the first LED light source and the output light of the laser light source. The third light-combining mirror is used to reflect the light of the fourth band and transmit the light in the first band except the fourth band.

13. The light source device according to claim 10, wherein the first light combining component comprises: a light-transmitting mirror, located between the first LED light source and the second light-combining mirror, and located at the intersection of the outgoing light of the first LED light source and the outgoing light of the laser light source; A reflective layer is provided on the surface of the light-transmitting mirror facing away from the first LED light source; the reflective layer is used to reflect the output light of the laser light source toward the second light-combining mirror; and the other parts of the light-transmitting mirror except for the reflective layer are used to transmit the output light of the first LED light source.

14. The light source device according to claim 13, wherein the reflective layer is located at the center of the light-transmitting mirror; and the area of ​​the reflective layer is less than or equal to 1 / 10 of the area of ​​the light spot emitted by the first LED light source.

15. The light source device according to any one of claims 10 to 14, further comprising: a first collimating lens group, located on the light-emitting side of the first LED light source; a second collimating lens group, located on the light-emitting side of the second LED light source; a third collimating lens group, located on the light-emitting side of the third LED light source; a fourth collimating lens group, located on the light-emitting side of the fourth LED light source; A converging lens group, located on the light-emitting side of the laser light source; a beam reducing lens group, located between the first light combining mirror and the second light combining mirror; The light homogenizing component is located on the light output side of the second light combining mirror.

16. A projection system, characterized in that: include: The light source device according to any one of claims 1 to 7 or the light source device, illumination light path, light valve modulation component and projection lens according to any one of claims 8 to 15; In which, the illumination light path is located on the light-emitting side of the light source device, the light valve modulation component is located on the light-emitting side of the illumination light path, and the light valve modulation component is used to modulate the incident light and then reflect it; the projection lens is located on the reflected light path of the light valve modulation component, and the projection lens is used to image the output light of the light valve modulation component.

Images